1引言2009年患者保护与平价医疗法案(ACA)开始再次关注基层医疗及其在实现美国三重目标——人群健康改善、医疗服务改进、医疗费用降低方面的作用。考虑到美国人口的老龄化、人口数目的增长及参保人口的增多,数十年的证据支持基层医疗具备改善已超过整体经济增长数十年且仍可能继续增长的医疗费用状况的潜能。在已明确的基层医疗特征里,医疗的综合性或其覆 1 INTRODUCTION The 2009 Patient Protection and Affordable Care Act (ACA) begins to focus once again on primary care and its role in achieving the triple goal of the United States - improving health for the population, improving health care services, and reducing health care costs. Given the aging population, population growth and population increase in the United States, decades of evidence support that primary care has the potential to improve the cost of health care that has exceeded decades of overall economic growth and is still likely to continue to grow. In the clear characteristics of primary care, the comprehensiveness of medical care or its coverage